2. Read this summary. Does it include all the key facts that you underlined? Does it leave out all the unnecessary detail that you put in brackets?
Researchers have discovered information about past diseases by analyzing DNA from ancient mummies. Today leishmaniasis, which causes 500,000 deaths annually, is found in many parts of the world. The deadly type, visceral leishmaniasis, is found mainly in North Africa. The researchers tested DNA of bone from Egyptian and Nubian mummies. They found leishmaniasis DNA in nine Nubian mummies from 550 AD, and in four Egyptian mummies from 2050 BC, when Egypt had strong trade links with Nubia. Egyptian mummies from before and after these dates showed no signs of visceral leishmaniasis. Researchers concluded that the disease developed in Nubia. This research should help us to understand the development of other diseases, and how to control and treat them.